Study of solid and fluid inclusions in carbonatite is vital for understanding the nature of primary carbonatitic magma. In this study, biphase fluid inclusions were observed in calcites and solid mineral inclusions were observed in accessory magnetite in Sung Valley carbonatite of NE India. Thi carbonatite is part of an Ultramafic-Alkaline-Carbonatite Complex (UACC), related to the Kargue-len Plume activity. All of the studied inclusions are primary in nature. Raman spectroscopy of these inclusions suggested that the biphase inclusions hosted by calcite are essentially composed of water whereas, the solid mineral inclusions hosted by magnetite in the Sung Valley carbonatite are manasseite, ferrohog-bomite and amesite. The extremely hydrous minerals inclusions occurring in the magnetite are not a product of hydrothermal alteration but represent the primary magmatic characteristics of the parental magma. Our observations suggest that the parental magma of the Sung Valley carbonatite was ultra-hydrous in nature, which can be attributed to metasomatism of the source carbonated peridotite. Our study also suggests that there is a strong possibility for more hydrous carbonatite melts to occur on a global scale. Plain Language Summary Primary solid inclusions of manasseite, ferrohogbomite and amesite and biphase fluid inclusions of H 2 O were observed in magnetite and calcite respectively in Sung Valley carbonatite of northeast India. These carbonatite are related to Kerguelen mantle plume. Solid and fluid inclusions, identified with the help of Raman spectroscopy, are all of hydrous nature and provide detailed information about the magma these carbonatite have crystallized from. Inclusion data suggests that the parental magma of these carbonatite had a significant amount of dissolved water. Such ultra-hydrous character of the parental magma could be acquired due to the exhaustion of hydrous minerals during low degree of partial melting of the source carbonated peridotite.